152 lines
4.4 KiB
C
152 lines
4.4 KiB
C
/* $NetBSD: info_union.c,v 1.9 1999/02/01 19:05:10 christos Exp $ */
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/*
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* Copyright (c) 1997-1999 Erez Zadok
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* Copyright (c) 1990 Jan-Simon Pendry
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* Copyright (c) 1990 Imperial College of Science, Technology & Medicine
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry at Imperial College, London.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgment:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* %W% (Berkeley) %G%
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*
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* Id: info_union.c,v 1.2 1999/01/10 21:53:47 ezk Exp
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*
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*/
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/*
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* Get info from the system namespace
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*
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* NOTE: Cannot handle reads back through the automounter.
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* THIS WILL CAUSE A DEADLOCK!
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif /* HAVE_CONFIG_H */
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#include <am_defs.h>
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#include <amd.h>
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#define UNION_PREFIX "union:"
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#define UNION_PREFLEN 6
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/* forward declarations */
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int union_init(mnt_map *m, char *map, time_t *tp);
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int union_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp);
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int union_reload(mnt_map *m, char *map, void (*fn) (mnt_map *, char *, char *));
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/*
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* No way to probe - check the map name begins with "union:"
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*/
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int
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union_init(mnt_map *m, char *map, time_t *tp)
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{
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*tp = 0;
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return NSTREQ(map, UNION_PREFIX, UNION_PREFLEN) ? 0 : ENOENT;
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}
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int
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union_search(mnt_map *m, char *map, char *key, char **pval, time_t *tp)
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{
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char *mapd = strdup(map + UNION_PREFLEN);
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char **v = strsplit(mapd, ':', '\"');
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char **p;
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for (p = v; p[1]; p++) ;
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*pval = xmalloc(strlen(*p) + 5);
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sprintf(*pval, "fs:=%s", *p);
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XFREE(mapd);
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XFREE(v);
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return 0;
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}
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int
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union_reload(mnt_map *m, char *map, void (*fn) (mnt_map *, char *, char *))
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{
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char *mapd = strdup(map + UNION_PREFLEN);
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char **v = strsplit(mapd, ':', '\"');
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char **dir;
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/*
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* Add fake /defaults entry
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*/
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(*fn) (m, strdup("/defaults"), strdup("type:=link;opts:=nounmount;sublink:=${key}"));
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for (dir = v; *dir; dir++) {
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int dlen;
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struct dirent *dp;
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DIR *dirp = opendir(*dir);
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if (!dirp) {
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plog(XLOG_USER, "Cannot read directory %s: %m", *dir);
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continue;
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}
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dlen = strlen(*dir);
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#ifdef DEBUG
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dlog("Reading directory %s...", *dir);
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#endif /* DEBUG */
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while ((dp = readdir(dirp))) {
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char *val, *dpname = &dp->d_name[0];
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if (dpname[0] == '.' &&
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(dpname[1] == '\0' ||
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(dpname[1] == '.' && dpname[2] == '\0')))
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continue;
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#ifdef DEBUG
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dlog("... gives %s", dp->d_name);
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#endif /* DEBUG */
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val = xmalloc(dlen + 5);
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sprintf(val, "fs:=%s", *dir);
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(*fn) (m, strdup(dp->d_name), val);
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}
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closedir(dirp);
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}
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/*
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* Add wildcard entry
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*/
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{
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char *val = xmalloc(strlen(dir[-1]) + 5);
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sprintf(val, "fs:=%s", dir[-1]);
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(*fn) (m, strdup("*"), val);
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}
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XFREE(mapd);
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XFREE(v);
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return 0;
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}
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